Connecting
6.4 Power supply
SCALANCE X-300
138 Operating Instructions, 02/2012, A5E01113043-12
Grounding
WARNING
PE connection with X-300EEC and XR-300EEC
Grounding simply via the housing is inadequate. For safe operation, the protective ground
must be connected to the grounding bolts.
On the SCALANCE X-300EEC, the PE connector is on the bottom of the device. On the
SCALANCE XR-300M EEC, the PE connector is on the rear of the device between the
power connectors.
Connecting to the power supply
The connection is made via one (or two) 3-pin connector(s) on the terminal block for the
power supply.
Table 6- 6 Pin assignment at terminal block 100 to 240 VAC / 60 to 250 VDC for the power supply
Pin number Assignment
Pin 1 L (100 to 240 V)
Pin 2 N
Pin 3 FE (functional earth)
To wire up the power connector, use a copper cable of category 18-8 AWG or cable with a
cross-section of 0.75 to 6 mm².
DC voltage is connected at the following terminals:
● Plus to "L"
● M to "N"
Secure the firm seat of connectors and the terminal block by tightening the screws (does not
apply to X-300EEC).
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